Bag spreader mechanism



Nov. 23, 1943. 'R A. RAICHE BAG SPREADER MECHANISM 2 SheetS-Shee't l Filed April l0, 1940 INVENTOR c/w/ 4 f BY 7 TTORNEY Nov. .'239 i943. P. A. RAlcHE BAG SPREADER MECHANISM Filed April 1o. 1940. 2 sheets-sheet 2 1 Patented Nov. 23,31943113 'Y 'l :I Paul.A..lRaiche,Providence,f R. I'., assignorlzto."

,j Davol RubberfCompany, a corporation of Rhodev island tureof rubberbags and has'particular reference The presentinvention relatesto the manufac# Application prillO, 1940, SerialNo. 338,855L

` (01.18.42)` Y ,p ff

` and I`4, the centralwpdrtionl Efof'the Vshaft, lf`ia/'i.r1glV a longitudinalkey i3 and a piston Il threaded to "the /strippingof moldcoresffrom hotwater bags and-the like;

' AIt'isthe principalobject ofthe'invention to rovi'deVV a power-'spreader for spreading theneck of arubber Vbagfsuiliciently'to' permit'withdrawal vof the mold core therefrom.A

Anotherobiect of the inventiongisto provide a agradual spreading action.- v w control for -the power-spreader whiclr results 'in Further objects of theginvention are `to pro-' vide a spreadermechanism which is positive in action, and which isV simple and inexpensive to manufacture and to use. f I

With the above and other objects and advantageous features in'vievv,` the inventionconsists of a novel arrangement of parts more fully described in the detailed description' following, in con.

junction with the ,accompanying drawingaand more specifically dened inthe claims appended thereto.

In the drawings:

Fig. 1 is a top plan View ofthel novel spreader mechanism, parts being in section;

Fig. 2 is a'front elevation of the spreader mechanism;

Fig. 3 is a perspective View of a hot water bag and its core, as removed Yfrom the molding machine; Y

Fig. fl is a detail View showing the spreader arms inserted in the hot water bag;

Fig. 5 Vis a detail View showing the Vspreader arms in spread position,VV and thecore in process of removal; and Y f Y Y f Y Fig. 6 is a perspective view of the stripped hot water bag. Y

It has been found desirable to provide a power spreader for hot water and Aother molded bags` with small necks, which are molded with inner cores which must be removed -frorn the `bagsafter slidably *mounted lon thef shaft and"-having Ia longitudinal s loti9' in the forward head 2 0 ofthe cylinder for thekey 'i The forward head 20 and theV rear head 21 are suitablyVV packed"and" the .piston I 1 has` stan `d ard type cup-'shaped resilient washers EZengaging thefinner surfaceiof the Vwith the conduit 23 through a T 26 havinga con-l trol valve .lwhich is set to greatly reduce the quantity of pressure fluid admitted to the conduit 23, the source 25 also communicating with the conduit 23 through a T` 28 and a manually movablecontrol valve 25. VBoth valves 21 and 29 communicate with a pressure relief outlet 30, the valvev 21 being slightly open to the reliefk outlet to always maintain the fluid in conduit 23 under re Y25 Y rduced pressure.

Thejspreader includes a Xed arm 3l which, as

illustrated, has a horizontally extending linger 32 terminating in a bent` rounded end 33, the arm being secured to the bracket l2. A movable arm 34 which vhas av longitudinally extending finger 35 and a bent rounded end 3E, the ends 33 and 33 being oppositely directed,` see Fig. 1, is secured to the movable cylinder I8.

Referring now to Fig. 3, the bag 3l when removed from the molding machine has a narrow neck 38, and ismounted on a core piece 39 which vcarries the inner mold core di), see Fig. 5. Thebag and corepiece are placed on a suitable support 4l,

see Figs. 1 and 2, with the neck 38 towards the ngers 32, 35, and is slid forwardly to push the Y fingers into the bag as shown in dotted lines in spreading the necks. Spreading offthe neck of a hot Water bag or bottle of the heavy rubber type the cost of manufacture. I have found it feasible to provide a simple apparatus'operated byv a Fig. 4., The piston il, see Fig. l, is at the extreme right of the cylinder, the pressure uid entering through valve 2l, the valve 29 being open to ex,-V haust or relief. The operator now opens valve 29 and the full fluidpressure enters on the right of the piston through'conduitd, and forces the power fluid such as compressed air, which'power cylinder to the right, the fluidV on the leftV of the piston being pushed out through the relief exit 33. Themovement of cylinder i8v is gradual, due

' to the effect of the back fluid pressure on the left of the piston, and the bag vneck is smoothly distended to theposition shown in Fig. 5, whereby the inner core 43 is readily removed. Closing of valve 29 exhausts the fluid pressure on the right of the piston and permits the iluid pressure on the left of the piston to build up and move the arms 3l and 34 in adjacency, the bag 31 then being readily removed therefrom. y

The above-described apparatus is composed of a small number of parts which are readily manufactured and assembled; and Whichare simply operatedb'y meansl of a pressure uid such as compressed air to spread the necks of hot water bags and bottles and the like, and thus facilitate and expedite the removal of inner bag cores.

Although a specific constructional embodiment `of the inventionrhas been described and illustrated, it is obvious that changes in the size and shape of the parts, and in their operation, may be made to ksuit the requirements for different power spreaders for any spreading purpose, Without departingffrom' the spirit and the scope of the invention as dened in theI appended claims.

` c'orepulling 'machine comprising` a Vsupport v spreader arm ,idto lsaid support, ka prefssureA'iiui'd'-4 motor mounted on said support @e paving a cyiinuere'iement iqs'ed at beth ends and ap's onelement 'one of said elmentsbein'g movable, ase iidspreadefarmusecured to the mgyabileni'ent ,and iifinallypcsitionedinfadiaj cency to thelfirst spreader eliiix'engia source of fluidereseura e pndut. rvr #inductive press-@1re fluidfromsad YSulff Said cylinder dri @he side of said piston to spread said spreaderarms and a vsecondconduit for conducting pressure fluid cylinder to the position shown in Fig. 4, with the Cil from said source to the yother Side of said piston, to bring said spreader arms into adjacency, pressure reduction means in said second conduit for i,

providing a reduced back pressure, pressure relief,l means in said second conduit for relieving excess pressure therein, and a manually controlled valve in said rst conduit for vselectively communicating said rcylinder on saidI onesi'de of,` said piston Y With-the source of fluid pressure or with'exhaust.

2. A core pulling machine comprising a, supl v port, a spreader arm 'Xed to saidsupport, a pres- .sure fluid motor mounted on said support and having a cylinder element closed at both ends and from said source to the other `side oisaid piston to bring said spreader arms into adjacfency, pressure reduction means in saiduseoon'd conduit for f providing Y a reducedV back pressure,y .pressure reliefmeans'` in said second conduitvfor relievingL excess pressure therein, and a manually controlled,

valve in'psaid rstpconduitA for selectively. oommunicating saidcylinderwon Vsaid' one side of said piston with the source A'oft' fluid pressure'or with 'A exhausts Y PAULA.RAICHE.-` 

